Writing instrument



FIG. 1 is a right side elevational view of a writing instrument showing my new design;

FIG. 2 is a rear elevational view of the writing instrument of FIG. 1;

FIG. 3 is a left side elevational view of the writing instrument of FIG. 1;

FIG. 4 is a front elevational view of the writing instrument of FIG. 1;

FIG. 5 is a bottom view of the writing instrument of FIG. 1; and,

FIG. 6 is a top view of the writing instrument of FIG. 1. 

The ornamental design for the writing instrument, as shown and described. 